2130212123 has 4 divisors (see below), whose sum is σ = 2294074608. Its totient is φ = 1966349640.

The previous prime is 2130212111. The next prime is 2130212129. The reversal of 2130212123 is 3212120312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2130212123 - 2⁶ = 2130212059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2130212129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81931223 + ... + 81931248.

It is an arithmetic number, because the mean of its divisors is an integer number (573518652).

Almost surely, 2^2130212123 is an apocalyptic number.

2130212123 is a deficient number, since it is larger than the sum of its proper divisors (163862485).

2130212123 is a wasteful number, since it uses less digits than its factorization.

2130212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163862484.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2130212123 is about 46154.2210745670. The cubic root of 2130212123 is about 1286.6910614974.

Adding to 2130212123 its reverse (3212120312), we get a palindrome (5342332435).

The spelling of 2130212123 in words is "two billion, one hundred thirty million, two hundred twelve thousand, one hundred twenty-three".